本文建立了适用于滨海粉土地基条件下基坑降水的饱和-非饱和三维地下水模型

This paper establishes a saturated-unsaturated three-dimensional groundwater model suitable for foundation pit precipitation under coastal powder soil foundation conditions, and simulates and analyzes the influence of complex conditions such as strong tides, rainfall, and well point failure on the foundation pit precipitation effect. Through model analysis, it is found that under the action of strong tides that occur once in 50 years or once in a century, the water level of the foundation pit at the entrance changes greatly, and the water level rises rapidly, which has a great impact on the safe construction of the foundation pit, while for the ship lock foundation pit The influence of the water level is relatively small; in the case of rainfall, the impact of continuous heavy rain on the water level of the foundation pit is greater, and the water level rises faster, but it is still possible to adjust the pumping of the foundation pit during rainfall. The water level of the pit is rising rapidly, and corresponding measures need to be taken in advance; under the joint action of strong tides and rainfall, the water level of the foundation pit has increased significantly and rises rapidly.

This article establishes a saturated unsaturated three-dimensional groundwater model suitable for foundation pit dewatering under coastal silt foundation conditions, and simulates and analyzes the impact of complex conditions such as strong tidal bore, rainfall, and well point failure on the dewatering effect of foundation pits. Through model analysis, it was found that the water level of the foundation pit at the entrance changes significantly under the action of strong tidal surges that occur once every 50 years or once every 100 years, and the water level rises rapidly, which has a significant impact on the safe construction of the foundation pit, while the impact on the water level of the ship lock foundation pit is relatively small; The continuous rainstorm has greater impact on the foundation pit water level during the rainfall condition, and the water level rises rapidly, but the foundation pit pumping can still be adjusted during the rainfall. However, in the case of continuous heavy rainstorm, the foundation pit water level rises rapidly, and corresponding measures need to be taken in advance; Under the combined action of strong tidal bore and rainfall, the water level in the foundation pit significantly increases and rises rapidly.

In this paper, a saturated-unsaturated three-dimensional groundwater model suitable for foundation pit dewatering in coastal silt foundation is established, and the influence of complex conditions such as strong tidal bore, rainfall and well point failure on foundation pit dewatering effect is simulated and analyzed. Through the model analysis, it is found that the water level of the foundation pit at the entrance changes greatly and rises rapidly under the action of the strong tidal bore with a return period of 50 years and a return period of 100 years, which has great influence on the safe construction of the foundation pit, but has relatively little influence on the water level of the foundation pit of the ship lock. The influence of continuous rainstorm on the water level of foundation pit is increased under the condition of rainfall, and the water level rises rapidly, but the pumping of foundation pit can still be adjusted during rainfall. However, in the case of continuous rainstorm, the water level of foundation pit rises rapidly, so corresponding measures need to be taken in advance. Under the combined action of strong tidal bore and rainfall, the water level of foundation pit has obviously increased, and it has risen rapidly.